A colour plate from the National Atlas showing permafrost and ground ice distributions in Canada: explore the key for a classification; click onto the two detailed extracts from the map (one in the Mackenzie Delta area in the far north - see Case Study 5) and one in part of central Manitoba (on the southern boundary of the permafrost).
http://ellesmere.ccm.emr.ca/wwwnais/select/pfrost/english/html/epfrost.html

National Parks in Alaska (see GAIA, p136, Places 18):

Denali National Park and Preserve

• home page
  http://www.nps.gov/dena/
• geology field notes, Denali
  http://www.aqd.nps.gov/grd/parks/dena/
• Landsat 1:250,000 USGS 1984 satellite image
  http://mahogany.lib.utexas.edu/Libs/PCL/Map_collection/National_parks/Denali_satellite.jpg
• relief map 1:250,000 USGS 1984
  http://mahogany.lib.utexas.edu/Libs/PCL/Map_collection/National_parks/McKinley.jpg

Glacier Bay National Park and Preserve

• home page
  http://www.nps.gov/glba/

Katmai National Park and Preserve

• home page
  http://www.nps.gov/katm/
• take a photographic trip through The Valley of Ten Thousand Smokes (active volcanoes of the Aleutian Range), with links
  http://www.gps.caltech.edu/~meltzner/alaska98/

Arctic National Wildlife Refuge, US Fish and Wildlife Service:

Good for tundra habitat, ice wedges, polygons and pingos.
http://www.r7.fws.gov/nwr/arctic/permpics.html

Alaska Science Forum: Living in the North Index:

Find out what it’s like to live in Alaska: from air quality problems to the relative merits of birch and spruce as fuel for a woodstove, to the safe weight of snow on a roof.
http://www.gi.alaska.edu/ScienceForum/living.html

Pollution Prevention Opportunities for the Oil Field Service Industry:

This is a guide written for the oil industry by the Alaska Department of Environmental Conservation Pollution Prevention Office, who are concerned to minimise damage to the fragile cold areas under development. It covers waste management in extreme Arctic conditions. There are explanatory text sections such as what is pollution prevention, how pollution can be controlled, costs and benefits.
http://es.epa.gov/program/regional/trade/p2-oppt.html

The Arctic Circle web site:

Visit this site for information about natural resources, economic development and other topics. There is also a GIS/Maps section with accompanying data on landforms, soils, climate, vegetation etc.
http://arcticcircle.uconn.edu/